In Utah v. Strieff, the U.S. Supreme Court held today that an outstanding arrest warrant can attenuate “the connection between an unlawful stop and the evidence seized incident to arrest.” The holding reverses the Utah Supreme Court, which had suppressed evidence obtained by an officer who stopped Strieff illegally and ran his ID to look for outstanding warrants. EPIC and 22 technical experts filed an amicus brief, warning the Court that reversing the Utah court would allow vast amounts of personal data stored in government databases—much of it inaccurate—to provide post hoc justification for unlawful seizures.